How to interact with a police officer(s)

If you're giving a cop attitude because you got pulled over or whatever, there are a few reasons...

1. You're just plain stupid...
2. You're self absorbed and think you are above the law. Fact, you aren't, see #1
3. You're intentionally trying to create a diversion or a distraction so you can hide something or you're thinking of doing something you should not. Again, see #1

There is no "legitimate" reason to do it. Unless you think being "just plain stupid" is a legitimate reason.... See #1...